1 /* 2 * Copyright (c) 2022 Nicholas Marriott <nicholas.marriott@gmail.com> 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 14 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <sys/types.h> 18 #include <sys/socket.h> 19 20 #include <stdio.h> 21 #include <unistd.h> 22 23 #ifdef HAVE_UCRED_H 24 #include <ucred.h> 25 #endif 26 27 #include "compat.h" 28 29 int 30 getpeereid(int s, uid_t *uid, gid_t *gid) 31 { 32 #ifdef HAVE_SO_PEERCRED 33 struct ucred uc; 34 int len = sizeof uc; 35 36 if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &uc, &len) == -1) 37 return (-1); 38 *uid = uc.uid; 39 *gid = uc.gid; 40 return (0); 41 #elif defined(HAVE_GETPEERUCRED) 42 ucred_t *ucred = NULL; 43 44 if (getpeerucred(s, &ucred) == -1) 45 return (-1); 46 if ((*uid = ucred_geteuid(ucred)) == -1) 47 return (-1); 48 if ((*gid = ucred_getrgid(ucred)) == -1) 49 return (-1); 50 ucred_free(ucred); 51 return (0); 52 #else 53 *uid = geteuid(); 54 *gid = getegid(); 55 return (0); 56 #endif 57 } 58